reserve_empty

gistfile1.rs

fn reserve_empty(nn: uint) -> str unsafe {
   // start with a null-terminated 0-length string
   let ss = "";

   // make a vector
   let vv: [u8] = unsafe::reinterpret_cast(ss);
   unsafe::leak(ss);
   
   // expand it to size + \0
   vec::reserve(vv, nn+1u);

   // forget the vector
   unsafe::leak(vv);

   // return it
   ret ss;
}